<template>
  <div class="login">
    <div class="login_box">
      <!--头像区域-->
      <div class="logo_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 表单区域-->
      <el-form
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
        ref="loginFromRef"
      >
        <!--用户名-->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="iconfont icon-user"
          ></el-input>
        </el-form-item>
        <!--密码-->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          ></el-input>
        </el-form-item>
        <!--按钮区域-->
        <el-form-item class="btns">
          <el-button type="primary" @click="Login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      // 登入的表单数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456',
      },
      // 表单验证规则
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  methods: {
    // 点击重置按钮，重置登录和密码 resetFields() ui中组件的方法名
    resetLoginForm() {
      this.$refs.loginFromRef.resetFields()
    },
    // 点击重置按钮，进行预验证 validate() ui中组件的方法名
    Login() {
      this.$refs.loginFromRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        //console.log(res) //返回一个promise对象
        if (res.meta.status !== 200) return this.$message.error('登录失败！');
        this.$message.success('登录成功！') 
        // 登录成功之后会有一个token值，保存到sessionStorage中
        // console.log(res)
        window.sessionStorage.setItem('token',res.data.token);
      //  通过编程式导航跳转到主页，路由地址式/home
        this.$router.push('/home');
      })
    },
  },
}
</script>
<style lang="less" scoped>
.login {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);

  .logo_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
